It is seldom necessary to "amend" a 501(c)(3) application. Name changes, address changes, and changes in an organization's structure or operations must be reported to the IRS as follows:

Name Change

​If your organization's name has changed, report that fact on the next annual IRS return the organization files. The IRS requires supporting documentation for a name change. For corporations, this would be a copy of an amendment to the Articles of incorporation that shows that the name change has been filed with the appropriate state authority. An unincorporated association should submit an amendment to the Articles of Association, Constitution, or other organizing document, showing the effective date of the name change. This must be signed by at least two officers, trustees or members.

An organization that does not file a paper return (for example, an organization that files Form 990-N, or an organization that is required to e-file), may report the change of name, with appropriate supporting documents, by letter or fax (not by phone) to:

If you want a letter from the IRS that reflects the new name, send a written request that includes proof of the name change to the address above. They will send a confirmation-type letter reflecting your organization's new name.​​

Address Change

​If your organization's address has changed, report that fact on the next annual IRS return the organization files. Organizations that do not file a paper return can use IRS Form 8822-B. (This form includes instructions.) You may also use this form if the address change occurs soon after a return was filed.

If you want a letter from the IRS that reflects the new address, send a written request to the address above. They will send a confirmation-type letter.​

Change of Accounting Period

The IRS requires most taxpayers to obtain advance permission before changing their accounting period, but a simplified procedure, which does not require advance permission, is available for tax exempt organizations. To do this, an organization must file a Form 990 for the "short year" resulting from the change. Write “Change of Accounting Period” at the top of the

short-period return. An organization that does not file a paper return should send a letter to the address above. This simplified procedure is not available if an organization has changed its accounting period in the previous ten years. These organizations must file IRS Form 1128 to obtain advance permission for the accounting period change.

Structural and Operational Changes

​Significant changes in how an organization conducts its programs or furthers its exempt purposes must be reported on the next annual IRS return the organization files. Describe these items on Schedule O (Form 990 or 990-EZ). According to the instructions for Form 990, the IRS no longer issues letters confirming the tax-exempt status of organizations that report such changes. IRS.gov is not clear on how 990-N filers should report such changes. I would suggest a letter to the address above.